From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753959AbbJZN3E (ORCPT ); Mon, 26 Oct 2015 09:29:04 -0400 Received: from mga09.intel.com ([134.134.136.24]:21887 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753898AbbJZN3C (ORCPT ); Mon, 26 Oct 2015 09:29:02 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.20,201,1444719600"; d="scan'208";a="835673564" From: Jani Nikula To: Eric Biggers , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: Re: [Linux v4.3-rc6] i915: issues with Skylake integrated graphics In-Reply-To: <20151023023411.GA1148@zzz> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo References: <20151023023411.GA1148@zzz> User-Agent: Notmuch/0.20.2+57~gff3a03d (http://notmuchmail.org) Emacs/24.4.1 (x86_64-pc-linux-gnu) Date: Mon, 26 Oct 2015 15:28:37 +0200 Message-ID: <87pp014v3u.fsf@intel.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 23 Oct 2015, Eric Biggers wrote: > Hi, > > I am testing Linux v4.3-rc6 on a laptop with Intel 'Skylake' integrated > graphics. The integrated display works, but I noticed several warnings in the > kernel log, and a VGA monitor attached to the HDMI input via a VGA->HDMI adapter > did not work. Furthermore, the system hung for several seconds during boot. > The two WARNs were: > > [ 1.078097] WARNING: CPU: 0 PID: 1 at drivers/gpu/drm/i915/intel_pm.c:3321 skl_update_pipe_wm+0x7fa/0x810() > [ 1.078097] WARN_ON(p->pixel_rate == 0) Please file two separate bugs at [1], one for the above, and another for the below. Please add drm.debug=14 module parameter, and attach dmesg all the way from boot to the problem. Thanks, Jani. [1] https://bugs.freedesktop.org/enter_bug.cgi?product=DRI&component=DRM/Intel > ... > [ 1.353670] WARNING: CPU: 1 PID: 6 at drivers/gpu/drm/i915/intel_dp.c:854 intel_dp_aux_ch+0x10f/0x6a0() > [ 1.353670] dp_aux_ch not started status 0xad40001f > > The following error was reported later, when the HDMI input was connected but > the driver failed to report the input as connected: > > [ 52.553940] [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 130 > > I have attached the full 'dmesg' output for anyone who may find it useful. > > Eric > _______________________________________________ > dri-devel mailing list > dri-devel@lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/dri-devel -- Jani Nikula, Intel Open Source Technology Center